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HTML

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HTML preprocessors can make writing HTML more powerful or convenient. For instance, Markdown is designed to be easier to write and read for text documents and you could write a loop in Pug.

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Adding Classes

In CodePen, whatever you write in the HTML editor is what goes within the <body> tags in a basic HTML5 template. So you don't have access to higher-up elements like the <html> tag. If you want to add classes there that can affect the whole document, this is the place to do it.

About the <head>

In CodePen, whatever you write in the HTML editor is what goes within the <body> tags in a basic HTML5 template. If you need things in the <head> of the document, put that code here.

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Insecure Resource

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CSS

About CSS Preprocessors

CSS preprocessors help make authoring CSS easier. All of them offer things like variables and mixins to provide convenient abstractions.

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CSS Base

About CSS Base

It's a common practice to apply CSS to a page that styles elements such that they are consistent across all browsers. We offer two of the most popular choices: normalize.css and a reset. Or, choose Neither and nothing will be applied.

Vendor Prefixing

About Vendor Prefixing

To get the best cross-browser support, it is a common practice to apply vendor prefixes to CSS properties and values that require them to work. For instance -webkit- or -moz-.

We offer two popular choices: Autoprefixer (which processes your CSS server-side) and -prefix-free (which applies prefixes via a script, client-side).

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JavaScript

About JavaScript Preprocessors

JavaScript preprocessors can help make authoring JavaScript easier and more convenient.

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Babel includes JSX processing.

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Packages

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HTML 

              
                <div class="site-wrapper">
			<section class="tabs-wrapper">
				<div class="tabs-container">
					<div class="tabs-block">
						<div class="tabs">
							<input type="radio" name="tabs" id="tab1" checked="checked" />
							<label for="tab1"><span class="material-icons">favorite_border</span> Angular</label>
							<div class="tab">
								<h2>Angular</h2>
								<p>One of the most powerful, efficient, and open-source JavaScript frameworks is <a href="https://angularjs.org/">Angular</a>. Google operates this framework and is implemented to use for developing a Single Page Application (SPA). It extends the HTML into the application and interprets the attributes to perform data binding.</p>
							</div>

							<input type="radio" name="tabs" id="tab2" />
							<label for="tab2"><span class="material-icons">face</span> React</label>
							<div class="tab">
								<h2>React</h2>
								<p>Created by Facebook, the <a href="https://reactjs.org/">React framework</a> has earned popularity within a short period. It is used to develop and operate the dynamic User Interface of the web pages with high incoming traffic. It makes the use of a virtual DOM, and hence, the integration of the same with any application is more straightforward.</p>
							</div>

							<input type="radio" name="tabs" id="tab3" />
							<label for="tab3"><span class="material-icons">lightbulb</span> Vue</label>
							<div class="tab">
								<h2>Vue</h2>
								<p>Though developed in the year 2016, this <a href="https://vuejs.org/">JavaScript framework</a> has already made its way into the market and has proven its worth by offering various features. Its dual integration mode is one of the most attractive features for creating high-end SPA or Single Page Application.It is a much reliable platform for developing cross-platform.</p>
							</div>

							<input type="radio" name="tabs" id="tab4" />
							<label for="tab4"><span class="material-icons">grade</span> Ember</label>
							<div class="tab">
								<h2>Ember</h2>
								<p>The introduction of <a href="https://www.emberjs.com/">Ember.js</a> to the software market was 2015, and since then, it has gained popularity with its wide application area. The features of Ember.js support two-way data binding and hence, establish a reliable platform for handling the complicated User Interfaces. Popular websites like LinkedIn, Netflix, Nordstrom, and many more use the Ember.JS platform for their websites.</p>
							</div>
						</div>
					</div>
				</div>
			</section>
			<footer>
				<div class="credits"><a href="https://htmlcssfreebies.com/pure-html-css-tabs/" target="_blank">Pure HTML CSS Tabs</a> by HTMLCSSFreebies.</div>
			</footer>
		</div>
!

CSS 

              
                /**
 * Fonts
 */

@import url('https://fonts.googleapis.com/icon?family=Material+Icons');
@import url('https://fonts.googleapis.com/css2?family=Roboto:ital,wght@0,400;0,700;1,400;1,700&family=Source+Sans+Pro:ital,wght@0,400;0,700;1,400;1,700&display=swap');

/**
 * Reset
 */
*,
*::before,
*::after {
	box-sizing: border-box;
}

html {
	font-family: sans-serif;
	line-height: 1.15;
	-webkit-text-size-adjust: 100%;
	-webkit-tap-highlight-color: rgba(0, 0, 0, 0);
	padding: 0;
	margin: 0;
	-moz-osx-font-smoothing: grayscale;
	-webkit-font-smoothing: antialiased;
}

body {
	-webkit-text-size-adjust: 100%;
	-webkit-tap-highlight-color: rgba(0, 0, 0, 0);
	padding: 0;
	margin: 0;
	-moz-osx-font-smoothing: grayscale;
	-webkit-font-smoothing: antialiased;
	background-color: #e5e5e5;
	color: #1a1a1a;
	font-family: "Source Sans Pro", sans-serif;
	font-size: 1rem;
	line-height: 1.6;
}

p,
ol,
ul,
li,
dl,
dt,
dd,
blockquote,
figure,
fieldset,
form,
legend,
textarea,
pre,
iframe,
hr,
h1,
h2,
h3,
h4,
h5,
h6 {
	padding: 0;
	margin: 0;
	-moz-osx-font-smoothing: grayscale;
	-webkit-font-smoothing: antialiased;
}

/**
 * Global Rules
 */
h1,
h2,
h3,
h4,
h5,
h6 {
	color: #0d0d0d;
	font-family: Roboto, sans-serif;
	line-height: 1.2;
}

h1 {
	font-size: 40px;
}

h2 {
	font-size: 35px;
}

a,
a:visited {
	background-color: transparent;
	color: #0067b8;
	text-decoration: none;
	border-bottom: 1px dotted;
}

a:hover,
a:active {
	border-bottom: none;
	outline: 0;
}

a:focus {
	border-bottom: none;
	outline: thin dotted;
}

a img {
	border: 0;
}

footer {
	display: flex;
	align-items: center;
	justify-content: center;
	margin: 2rem;
}

footer .credits {
	font-size: 1rem;
}

/**
 * Tabs Container
 */
.tabs-container {
	padding: 2rem;
}

/**
 * Tabs Block
 */
.tabs-block {
	display: flex;
	align-items: center;
	justify-content: center;
}

/**
 * Tabs
 */
.tabs {
	display: flex;
	flex-wrap: wrap;
	width: 100%;
}

.tabs label {
	width: 100%;
	display: flex;
	align-items: center;
	justify-content: center;
	padding: 1rem 2rem;
	margin-right: 0.0625rem;
	cursor: pointer;
	background-color: #000;
	color: #fff;
	font-family: Roboto, sans-serif;
	font-size: 1.2rem;
	font-weight: 700;
	transition: background-color ease 0.3s;
}

.tabs label .material-icons {
	margin-right: 0.3rem;
}

.tabs .tab {
	flex-grow: 1;
	width: 100%;
	height: 100%;
	display: none;
	padding: 1rem 2rem;
	color: #000;
	background-color: #fff;
	box-shadow: 0 10px 10px rgba(0, 0, 0, 0.4);
}

.tabs .tab > *:not(:last-child) {
	margin-bottom: 0.8rem;
}

.tabs [type=radio] {
	display: none;
}

.tabs [type=radio]:checked + label {
	background-color: #fff;
	color: #0067b8;
	border-top: 4px solid #0067b8;
	box-shadow: 0 10px 10px rgba(0, 0, 0, 0.4);
}

.tabs [type=radio]:checked + label + .tab {
	display: block;
}
@media (min-width: 768px) {

	body {
		font-size: 1.125rem;
	}

	.tabs-container {
		padding: 4rem 4rem;
	}

	.tabs label {
		order: 1;
		width: auto;
	}

	.tabs .tab {
		order: 9;
	}

	.tabs [type=radio]:checked + label {
		border-bottom: none;
	}
}
@media (min-width: 992px) {

	.tabs {
		width: 800px;
	}
}
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JS
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